Peening tool



2 Sheets-Sheet 1 Q. c'. BARBER PEENING TOOL Filed June 18, 1927 a 5 1 a m W in M M 1 Wm H 6 v M=, .5%, W 1 x 4 m L. 7 1-- 1 l 3 5 9 6 3 4 z 1 May 8;. 1928.

May 8. 1928. 1,669,116

Q- C. BARBER FEENING TOOL Filed June 18. 17927 2 Sheets-Sheet 2 gwwntoz a 61mm."

Patented May El, 1928. i

usrrsn STATES QUAY o. BARBER, or CLEVE AND, 01 x10.

PEENING, root.

Application filed June is, 1927. Serial 1T0; 199,773.

The present invention is directedto im- PIOVGEDOEILS 1n peening tools. 7

The primary object of the invention is to provide a tool of this cl'iaracter so con-- it can be gradually lowered in the bore of a cylinder and rotated in order that the inner Wall of the cylinder bore will be subjected to the action of the peening head.

of a cylinder.

In the accompanying drawings: Figure 1 1s a slde elevation of the tool showing the same in connection wlth the bore Figure 2 is an enlarged detail sectional view through the head and sleeve.

Figure 3 is a sectional view on line 33 of Figure 2. I a

Figure 4 is a detail sectional view through the hose connect-ion.

Referring to the drawings, the numerall designates a sleeve which is liked in any suitable manner to the front-head2 of a pneumatic tool 3 of any well known type, the piston hammer 51 of which is reciprocated in the usual manner. In order that the piston hammer may be reciprocated, a spindle 5 is threaded into the back head 6 of the tool, said spindle having an axial bore 7 and a transverse passage 8 in order that compressed air can be conducted to the tool for reciprocating the hammer. A collar 9 is rotatably engaged upon the spindle and has an annular chamber 10 formed therein to permit air from the nipple 11 to enter the passage 8, bore 7, and thence into the piston hammer chamber of the tool 3.

vAn air hose 10is connected to the nipple 11 and leads from any suitable source of supply of compressed air. The upper end of the spindle 5 is designed to engage in the chuck of a drill press in order to rotate the tool 3, and since the collar 9v is swiveled thereon tangling of the hose 11 is obviously prevented.

The lower end of the sleeve 1 has formed integral therewith a head 12 provided with a conical chamber 13 and in which the lower end of the shank 14 extends, said shank being slidable in the sleevel and having its 1 upper end positioned to be subjected to the blows from the hammer 1; Mounted in the chamber 13 is a tappet 15 havinga socket 16 and in whichifitsi the extended end of the shank 14: as clearly shownin Figure 2fofthe drawings.

The head 12 has bolted thereto a plate 16 formed with a'central recess'l'? "and; a plurality of. radially, disposedwopen-ended grooves 18, the bases of which being curved as at19. Mounted in the grooves 18 for limited sliding movement are plates 20 having their outer ends provided with peening heads 21 and their inner ends provided'with anvils 22, said plates having "recesses 23 formed therein, the purpose of which will be later explained.

The inner edges of the plates are curved in order to conform to the curvature of the bases of the grooves. Coilsprings 24 have their inner ends seated in the recesses 23 and their outer ends in engagement with a ring 25 clamped between the plate 16 and head 12, said springs normally serving to hold the peening heads 21 retracted within the grooves 18 and the anvils 22 above the plane of the upper surface of the" plate 16. The

tappet isprovided with an extension 26 through the hose 10. As soon as air is admitted to the tool the piston hammer during its reciprocation will strike the adjacent end of the shank 1 1, thus causing the tappet 15 to transmit the impact of blows'to the anvils 22, whereupon the plates 20 will berapidly vibrated in the grooves 18 in order that the peening heads 22 will strike the inner wall. of the cylinder bore, the springs 24 serving to retract the plates after each blow. Since the head 12 'is being rotated and gradually lowered by the drill press into the bore of the cylinder, the entire inner surface of the wall thereof will be subjected to the action of the peening heads.

' Having thus described the invention, What is claimed is:

1. A tool of the class described comprising a head having radially disposed grooves therein, plates slidable longitudinally in the grooves and having peening heads upon their outer ends and anvils upon their inner ends, a tappet in the head, a shank engaged with the tappet, and means for subjecting the shank to the impact of blows for striking the anvils to actuate the peening heads.

I 2. A tool of the class described comprising a head having a plurality of radial grooves therein, plates slidable in the grooves, the plates including anvils and peening heads, a 'tappet in the head for engaging the anvils to slide the plates, thereby operating the peening heads, a sleeve carried by the head, a shank slidable in the sleeve and having its inner end engaged with the tappet, a motor carried by the sleeve and having a piston hammer therein for striking the shank to impart movement to the tappet and thus to the plates.

3. A tool of the class described comprising a head, a sleeve carried by the head, a motor carried by the sleeve, a shank in the sleeve, the motor having a piston hammer therein for striking the shank, said head having a plurality of radial grooves formed therein, plates slidable in the grooves and having peening heads, resilient means for normally holding the peening heads retracted in the grooves, a tappet" between the plates and shank for imparting blows to the plates. when the shank is subjected to blows from the piston hammer.

In testimony whereof I aflix my signature.

QUAY o. BARBER. 1 a] 

